Blueyedsoul, I was part of a trial in SF. We learned on average it was 2 weeks. I have been on PreP over 2 years now.
I have always took loads but it was with guy who where undetectable viral loads and did not do party drugs. Never in group play. I took a break and had no bb sex for 60 days before I went on the trials for PreP. I wanted to make certain I was negative. After I started the trial, I waited 30 days before I took any loads. I made sure my blood work came back ok. I wanted to be sure my kidneys weren't affected. If you are exposed to HIV then you need the drug in your system for 30 days. Otherwise the risk of the virus will become resistant to Truvada is higher.
